According to the United States Census Bureau, the CDP has a total area of 7.9 square miles (20.4 km²), of which, 7.9 square miles (20.3 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.49%) is water.

The area is dominated by the interchange of I-95, I-395, and the Capital Beltway (I-495), known as the Springfield Interchange. The center of the town is at the intersection of Route 644 (Old Keene Mill Road / Franconia Road) and Route 617 (Backlick Road) adjacent to the interchange. A significant commercial district exists around the interchange area, but the rest of the community is primarily residential in character.

According to the U.S. Postal Service, Springfield collectively has four ZIP codes:

22150 (often unofficially referred to as "Central Springfield", this is the zip code for the actual Springfield CDP itself.)

22151 ("North Springfield")

22152 ("West Springfield")

22153 ("Newington")

The following are total area, water area, and land area statistics (in square miles) for the four Springfield zip codes:[4]

A saw and grist mill was constructed in the vicinity of what is today Springfield between 1796 and 1800. Owned by James Keene, it gave its name to today's Old Keene Mill Road. The mill served farms in the area for around sixty years before its discontinuation when William H. Keene was convicted and imprisoned for the 1855 murder of Lewis Quincy Hall. Nothing remains of it today save for two mill races.[5]

Apartment complex in Springfield

MetroPark complex of offices

Springfield was founded in 1847 around the Orange and Alexandria Railroad's Daingerfield Station; this is today the Backlick Road Virginia Railway Express station, located off Backlick Road. The station was named for "Springfield Farm", owned by Henry Daingerfield, an Alexandria businessman who sat on the railroad's board of directors. The post office was completed sometime after 1851. It was in existence at the time of the American Civil War, being the site of a skirmish on October 3, 1861 and a Confederate raid on August 3, 1863. The station served as the first Springfield Post Office from 1866 to 1868.[6]

In 1877, Richard Moore petitioned for a post office, which he named Moor; it was located about a little over a mile south of the station, near the intersection of Fairfax (now Old Keene Mill) and Backlick roads. The post office name was changed in 1881 to Garfield to honor the late PresidentJames A. Garfield, who had been assassinated that year. In 1907, the Garfield post office closed and a new postal station named Corbett (after the then-landowner) opened back at the railroad station.[6] The name "Springfield" was reinstated for good on June 27, 1910,[7] although the name Garfield continued to appear on maps at least through the 1930s.[8] The post office was moved to a new site in 1933.[6]

Springfield remained a rural crossroads until 1946, when realtor Edward Carr decided to subdivide the area for suburban development along the recently opened Henry Shirley Highway (now I-95/I-395). Carr believed this to be the last easily accessible tract within 12 miles (19 km) of Washington, D.C., and indeed, the newly developed area grew quickly.[9] In 1950, the area had an estimated population of 1,000; Robert E. Lee High School was built in 1957. By 1960, the population was reported as over 10,000; it grew past 25,000 by 1970 with the North and West Springfield neighborhoods.[10]

Springfield became a major retail destination with the opening of the Springfield Mall (now Springfield Town Center) in 1973–75[11] (the second regional shopping center in Northern Virginia after Tysons Corner), as well as the Springfield and Brookfield shopping centers. The 1980s and 1990s saw the expansion of retail and high-density housing in the area, at least until the opening of the Franconia-Springfield Parkway in 1996, and the Franconia-Springfield Metro and Virginia Rail Express Station in 1997. The mall was renovated and re-opened in 2014.[12]

As of 2000, there were 10,495 households out of which 32.9% had children under the age of 18 living with them, 58.0% were married couples living together, 8.9% had a female householder with no husband present, and 28.8% were non-families. 22.1% of all households were made up of individuals and 7.7% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.37. As of 2010, the average household size was 2.82.

In the Springfield CDP, the population was spread out with 22.5% under the age of 18, 8.0% from 18 to 24, 34.2% from 25 to 44, 23.2% from 45 to 64, and 11.2% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 99.2 males. For every 100 females age 18 and over, there were 96.5 males.

The median income for a household in the Springfield CDP as of 2010 is $84,309, and the median income for a family is $95,158. In 2000, males had a median income of $45,679 versus $36,075 for females. The per capita income for the CDP is $36,405.

The zip code population totals for the entire Springfield community (as defined by USPS) are as follows:

Central Springfield is dominated by the Springfield Interchange, popularly known as the "Mixing Bowl" or the "Melting Pot", a name taken from an earlier interchange near the Pentagon. The interchange includes three Interstates (I-95, I-395, and I-495), with two exits less than a half mile apart, with two roads (Commerce Street and Route 644 (Old Keene Mill Road / Franconia Road)) going over or under I-95 within less than a half mile, and is further complicated by the presence of a separate, reversible high-occupancy vehicle lane passing through the center of two of the interstates.

Some Springfield neighborhoods feed schools outside the city limits, such as the Lake Braddock, South County, and Hayfield districts. Likewise, some Springfield schools are fed by neighborhoods outside the city limits.[23]